Switching between Claude Code session tabs in the cloud app side panel is very slow

Type: Bug (performance)

What's broken

In the Claude app (cloud), switching between Claude Code session tabs in the side panel is very, very slow. Clicking a different session takes a noticeable beat before the panel actually swaps to that session's content.

Impact

When I'm running multiple Claude Code sessions in parallel (which is a core workflow for me), I bounce between them constantly. Every switch costs a second or two of waiting, and that adds up fast. It makes the side panel feel like a tab bar with broken focus instead of a fast triage surface.

Expected behavior

Tab switches in the side panel should feel instant, the way switching between recent threads or projects elsewhere in the app does. If session content has to be fetched, it should at least swap to the new tab's chrome immediately so I know my click registered.

Environment

Reproduces consistently for me. Happy to provide more detail (browser, session count, screen recording) if it would help triage.